Originally Posted by loaders_loft
I use the hornady LnL modified case OAL gage and comparator, which is basically the same thing using the actual bullet to be used. A bit more gadgety though I could see the benefit of using the little insert shown in the article but I'm all set up now with this other system.
I'm thinking you may be confusing the plug used for purposes of establishing the maximum allowable cartridge case length prior to the neck bottoming out on the rifle chamber and pinching against the seated bullet, with establishing the bullet seating depth where the bullet touches the rifling? Two different reference points of measurement. One for trimming cartidge case length. The other for determining bullet seating depths that correspond to the contact with the rifling.
That's the best I can make of your post, compared to the subject matter within 1luckeyt/a's post.